Lock structure



N 1969 A. ROBINSON 3,480,314

LOCK STRUCTURE Filed June 27, 1967 5 Sheets-Sheet 1 INVENTOR. ALBERT L. ROBINSON Nov. 25, 1969 A. L. ROBINSON LOCK STRUCTURE Filed June 27, 1967 5 Sheets-Sheet 2 INVENTOR. ALBERT L. ROBINSON Ahforneys Nov.- 25, 1969 A. ROBINSON 3,480,314

' LOCK STRUCTURE Filed June 27, 19s? 5 Shets-Sheet s ALBERT L. ROBINSON QQM 2/ SWA AW Attorneys Nov; 25, 1969 A. L. ROBINSON LOCK STRUCTURE 5 Sheets-Sheet 4 Filed June 27, 1967 FIG. 8

FIG. 9

- INVENTOR.

ALBERT L. ROBINSON BY a $4 Attorneys A. L. ROBINSON Nov. 25, 1969 LOCK STRUCTURE 5 Sheets-Sheet 5 Filed June 2'7, 196'? FIG.

FIG. 22

FIG. 2!

INVENTOR.

ALBERT L. ROBINSON FIG. 20

Attornevs United States Patent US. Cl. 292-64 Claims ABSTRACT OF THE DISCLOSURE A lock structure for a door which includes a bolt housing for mounting in the door, a latch member mounted in the bolt housing, a bolt mounted in the bolt housing for movement therealong, a latch holding member moveably mounted on the bolt, means on the latch holding member engageable with the latch member to cause the latch member to move with the bolt, means urging the bolt to a latch extended position at which the latch is engageable with a latch keeper, and a latch actuatingslide engageable with the latch holding member to move the latch holding member to a latch released position, movement of the door in door opening direction when the latch member is released causing action of the. latch member on a latch keeper to cause the latch member to swing for releasing the latch keeper.

This invention relates to lock structures, for doors and the like.

An object of this invention is to provide a lock structure which holds a door firmly inclosed position and which can be released by movement of door handles in the direction that the door moves on opening.

A further object of this invention is to provide such a lock structure in which advance of one of the handles in door closing direction following closing of the door operates a lock bar preventing opening operation by means of an outside door handle.

Briefly, this invention provides a lock having a latch which can slide with a bolt and which latch can also swing with respect to the bolt. A latch lever, which moves with the bolt, can lock the latch against swinging. Actuators attached to handles on opposite sides of the door can be brought into engagement with the latch lever to swing the latch lever and release the latch, whereupon movement of the door in door opening direction causes the latch to act on a latch keeper to cause retraction of the latch and bolt. Movement of either handle in door closing direction after the door is closed causes engagement of a lock bar with the bolt to prevent opening of the door by movement of the. handle on the outside of the door until the lock bar is released. Thereafter, the lock bar can be advanced to released position by moving the inner door handle in door opening direction.

The above and other objects and features of the invention will be apparent to those skilled in the art to which this invention pertains from the following detailed description and the drawings, in which:

FIG. 1 is a perspective view of a door and door jamb, the door incorporating a lock structure constructed in accordance with an embodiment of this invention;

FIG. 2 is a view in side elevation on an enlarged scale of a handle which forms a portion of the lock structure, the handle being shown mounted on a fragmentary portion of the door;

FIG. 3 is a view in section taken on the line 3-3 in FIG. 2;

FIG. 4 is a view in section taken on the line 4-4 in FIG. 3, a bolt housing and bolt and surrounding parts being broken away to reveal internal structure;

3,480,314 Patented Nov. 25, 1969 FIG. 5 is a view in section taken on the line 5-5 in FIG. 3, actuator slides being broken away;

FIG. 6 is a view in section taken on the same line as FIG. 5 but with one of the actuator slides being shown in full and other actuator slide being partly broken away to reveal details of structure;

FIG. 7 is a view in section taken on the same line as FIG. 4 but with one of the actuator slides displaced into lock releasing position;

FIG. 8 is a view in section taken on the same line as FIG. 4 but with the latch released and retracted to door partly open position;

FIG. 9 is a view in section taken on the same line as FIG. 4 but with the actuator slides being shown in full;

FIG. 10 is a view in end elevation of a fragmentary portion of the door and an end plate of a bolt housing taken in the direction of the arrows 10-10 in FIG. 9;

FIG. 11 is a view in section taken on the same line as FIG. 4 but showing the lock in position after the door has been opened and partially re-closed;

FIG. 12 is a view in section taken on the line 12-12 in FIG. 11;

FIG. 13 is a perspective view of a latch which forms a portion of the lock structure;

FIG. 14 is a view in section taken on the line 14-14 in FIG. 8;

FIG. 15 is an enlarged fragmentary sectional view showing details of a guide pin and supporting portions of the lock structure;

FIG. 16 is a perspective view of a lock slide forming a part of the lock structure;

FIG. 17 is a perspective view of a lock slide engaging spring member of the lock;

FIG. 18 is a view in section taken on the line 18-18 in FIG. 17 on an enlarged scale;

FIG. 19 is a fragmentary view in section taken generally on the same line as FIG. 4, parts being broken away to reveal structural details, the lock slide being shown in locking position;

FIG. 20 is a perspective view of a latch actuating slide which forms a portion of the lock structure;

FIG. 21 is a View in section taken on the line 21-21 in FIG. 9; and

FIG. 22 is a view in section taken on the line 22-22 in FIG. 21, portions of the lock structure being omitted for clarity.

In the following detailed description and the drawings, like reference characters indicate like parts.

In FIG. 1 is shown a door 21 provided with a latch 22 actuated by a lock structure constructed in accordance with an embodiment of this invention. An outer handle 23 and an inner handle 24 (FIG. 4) can be employed to open and close the door and to actuate the latch mechanism. The door closes against a door jamb 25 which carries a latch keeper 26 having a slot 26 in which the latch 22 can be received.

The latch 22 is mounted in a bolt housing 27 with a head portion 28 of the latch being adapted to extend through a substantially rectangular slot 29 in an end plate 31 (FIG. 10) of the bolt housing 27. The bolt housing is received in a lengthwise bore 31' (FIG. 4) in the door. Screws 31 (FIGS. 5 and 10) attach the face plate 31 to the door to hold the bolt housing 27 in place in the bore 31'.

The head portion 28 of the latch 22 (FIG. 4) is of usual construction and includes a flat face 32, which can engage a face 33 of the slot 26 of the latch keeper 26 to hold the door in closed position. The head portion 28 also has a curved camming face 34, which can engage the latch keeper as shown in FIG. 11 to drive the latch 22 inwardly of the bolt housing 27 as the door closes.

Upper and lower faces 35 and 35' of the head portion 28 are flat and, as shown in FIG. 10, engage upper and lower faces 35" and 35" of the slot 29 in the end plate 31. The inner portion of the latch includes transversely extending flange portions 36 and 37 which, as shown in FIG. 4, can engage flange portions 38 and 39 of the end plate 31 of the bolt housing 27 when the latch is in an extended position shown in FIGS. 4 and 7. Behind the flange 37 is disposed a transversely opening slot 41 (FIG. 13). A sloping face portion 42 of the latch 22 is of arcuate cross-section as shown in FIG. 14, the curvature being substantially complementary to an inner face 43 of a generally cylindrical main wall 44 of the bolt housing 27.

The slot 41 is arranged to receive a hook portion 46 (FIG. 4) of a latch lever 47. The latch lever is pivotally mounted on a pivot pin 48. The pivot pin 48, in turn, is mounted in a transverse socket 49 (FIG. 11) in a bolt 51. When the hook portion 46 is received in the slot 41 of the latch, as shown in FIG. 4, the latch is locked H against pivotal or swinging movement and moves with the bolt 51 as the bolt 51 slides along the bolt housing 27. When the latch lever 47 is swung to the FIG. 7 position, the latch 22 is released and can swing from the FIG. 7 position to the FIG. 8 position as the door is advanced in door opening direction with the latch remaining trapped inside the bolt housing and locked against turning about the axis of the bolt housing by engagement of the head portion of the latch in the slot 29 of the end plate.

The bolt 51 is slideably mounted inside the bolt housing 27. A slot 53 in the bolt 51 receives the latch lever 47 for swinging between the FIG. 4 position and the FIG. 7 position. A shoulder 54 adjacent the latch end of the bolt 51 limits swinging of the latch lever in clockwise direction as shown in FIG. 8. The latch lever 47 is resiliently urged in clockwise direction by a compression spring 56 mounted in a transverse socket 57 in the bolt 51 which intersects a base wall 58 of the slot 53. A plug 59 of abrasion resistant plastic material, such as that commonly called nylon, mounted on the spring 56, engages an arm 61 of the latch lever 47.

The bolt 51 is urged toward door latching position by a compression spring 62 mounted in a socket 63 in the bolt which extends parallel to the axis of the bolt. A guide plug 64 mounted inside the spring 62 keeps the spring in alignment with the socket 63. An enlarged head 65 of the plug 64 engages a transverse plate 66. The plate 66 backs up against a split ring 67 received in an annular inwardly opening socket 68 in the bolt housing 27 at the end thereof remote from the end plate 31.

The latch 22 swings between tongues 69 and 71 which are a part of the bolt 51 and keep the bolt 51 and the latch 22 in alignment. A plug 72 of nylon or the like is mounted in a socket 73 in a face 75 of the shoulder 54 for engagement by the latch 22.

The latch lever 47 is actuated by latch actuating slides 74 and 76. As shown in FIG. 3, the latch actuating slide 74 includes upper and lower transverse bar portions 77 and 78 provided with bores 79 and 81, respectively, in which guide pins 82 and 83 are received respectively. Counterbores 84 and 86 at opposite ends of the bore 79 and counterbores 87 and 88 at opposite ends of the bore 81 receive compression springs 89, 91, 92 and 93, respectively, each of which surrounds one of the guide pins. The guide pins 82 and 83 are mounted in a face plate 94, which engages a face 96 of the door surrounding a transverse opening 97 which surrounds a central portion of the bolt housing 27 A second face plate 98 is mounted on the guide pins 82 and 83 and on other guide pins 98' (FIG. 9) and 98" (FIG. 7). As shown in FIG. 15, the guide pin 82 has an internally threaded axial socket 99 at an end thereof abutting the face plate 98. A shoulder bolt 100 has a hank 101 which extends thro gh an opening 102 4 in the face plate 98 with a tip 103 of the shank being threaded in the socket 99 and a shoulder 104 of the shoulder bolt engaging the face plates 98. The outer guide pins are of similar construction. Inner faces 106 and 107 of the face plates 94 and 98, respectively, can be provided with inwardly projecting prongs 108 to anchor the face plates against turning.

As shown in FIG. 3, the upper portion of the upper transverse bar portion 77 is provided with a groove 109 which receives an upper arm 110 of a lock slide 111. The lower portion of the lower transverse bar portion 78 is similarly provided with a groove 112 which receives a lower arm 113 of the lock bar 111.

The upper and lower transverse bar portions are connected by an upright bar 116 and an actuating arm 117. The actuating arm 117 carries an inwardly directed flange 118 which can extend through a slot 119 in the bolt housing 27 to engage the latch lever 47. The arm 117 extends outwardly through an open-ing 120 in the face plate 94 and is attached to a handle block 121 by a screw fastener 122. The outer handle 23 is attached to the handle block 121. A tongue 123 (FIG. 7) on the outer handle 23 is received in a groove 124 in the handle block 121. A set screw 126 mounted in the handle holds the handle and handle block in assembled relation. As shown in FIGS. 3 and 7, the handle block 121 is provided with sockets 127 which receive end portions of the guide pins.

The latch actuating slide 76 (FIG. 20) includes upper and lower transverse bar portions 128 and 129 (FIG. 20) which are similar in construction to the transverse bar portions of the latch actuating slide already described and are slideably mounted on the guide pins 98' and 98". The transverse bar portions are connected by an upright bar 133 and an actuator arm 134. The upright bar 133 carries an inwardly directed flange 136 which can extend through the slot 119 in the bolt housing 27 (FIG. 7) to engage the latch lever 47. As shown in FIG. 20, the upper transverse bar portion 128 is provided with a groove 137 which receives an end portion of the upper arm 110 (FIG. 9) of the lock slide 111. The lower transverse bar portion 129 is provided with a similar groove 138 (FIG. 20) which receives an end portion of the lower arm 113 of the lock slide 111.

Details of construction of the lock slide 111 are shown in FIG. 16. The lock slide 111 includes upper and lower transverse bar portions 141 and 142, which are connected by upright bar portions 143 and 144 to form a substantially rectangular frame. The upper arm 110 extends normally to the upper transverse bar portion 141, and the lower arm 113 extends normally to the lower transverse bar portion 142. Spaced sockets 146 and 147 are provided in a face 148 of the upper transverse bar portion 141. Similarly spaced sockets 149 and 151 are formed in a face 152 of the lower transverse bar portion 142.

The lock slide is held in position by upper and lower spring guides 153 and 154 (FIG. 6). Details of construction of the upper spring guide 153 are shown in FIGS. 17 and 18. The spring guide 153 includes a flat body 156 and end flanges 157 and 158 (FIG. 17). The end flanges 157 and 158 are provided with bores 159 and 161, respectively, in which the guide pin 98' is received, as shown in FIG. 9. A detent 162 (FIG. 18) is formed in the flat body 156. The detent 162 is receivable in the sockets 146 and 147 of the upper transverse bar portion 141 (FIG. 16) to hold the lock slide in locked and in unlocked positions. Outer faces of the end flanges 157 and 158 engage the face plates 98 and 94, respectively, as shown in FIG. 3. The spring guide 154 is of similar construction.

When one of the actuating slides 74 and 76 is moved outwardly (downwardly in FIG. 7), the actuating arms 110 and 113 (not shown in FIG. 7) are engaged in the slots of the transverse bar portions of the actuating slides, and the lock slide is advanced to the position shown in FIG. 19 in which the upright bar 143 of the lock slide is engageable by a shoulder 163 on the bolt 51 to prevent movement of the bolt in latch releasing direction. The upright-bar 143- backs up against the actuating slide 74.

When the inner handle 24 is advanced inwardly (upwardly in FIG. 9) the actuating slide 74 is advanced inwardly therewith, and the grooves of the transverse bar portions thereof pick up the arms 110 and 113 (not shown in FIG. 9) of the lock slide to return the lock slide to the FIG. 9 position. However, outer ends of the arms 110 and 113 are beveled, as indicated at 166 so that, when the outer handle 23 is advanced inwardly the arms 110 and 113 are not engaged and the lock bar 143 of the lock slide 111 remains in bolt locked position.

The latch actuating-slides 74 and 76 can be connected to slide together to permit unlocking of the lock structure from outside the door. The upright bar 133 of the latch actuating slide 76 (FIG. 20) is provided with a socket 168. The actuating arm 117 of the latch actuating slide 74 (FIG. 22) is provided with a similar socket 169. A

bridge member 171 (FIGS. 21 and 22) is receivable in the sockets 168 and 169 to connect the latch actuating slides 74 and 76 for movement together. The bridge member 171 is carried by a shaft 172, which is actuated by a cylinder lock 173 (not shown in detail) mounted in the handle block 121. The barrel of the cylinder lock 173 extends through an opening 173' (FIG. 22) in the face plate 94. The cylinder lock 173 is received in a slot 173" in the actuating arm 117 of the latch actuating slide 74. As shown in FIG. 2, an end portion 174 of the cylinder lock extends through an opening 176 in the outer handle 23. An appropriate key, not shown, can operate the cylinder lock 173 to turn the bridge member 171 into position where it is received in the sockets 168 and 169, whereupon inward movement of the outer handle causes both of the latch actuating slides 74 and 76 to advance inwardly together, and the grooves of the transverse bar portions of the latch actuating slide 76 pick up the arms 110 and 113 of the lock slide 111 to advance the lock slide 111 to the released position shown in FIG. 9. An annular escutcheon plate 178 (FIG. 3) snaps onto the face plate 94 and bridges the gap between the face plate 94 and the handle block 121. A similar escutcheon plate 179 snaps onto the face plate 98 and bridges the gap between the face plate 98 and a handle block 181 on which the inner handle 24 is mounted and which is generally similar to the handle block 121 except that the handle block 181 does not carry a cylinder lock.

When the door is to be opened either from the inside or from the outside of the door, one of the handles 23 and 24 is moved inwardly causing one of the latch actuating slides 74 and 76 to move inwardly therewith. Inward movement of one of the latch actuating slides causes the latch lever 47 to swing from the FIG. 4 position to the FIG. 7 position releasing the hook portion 46 thereof from the slot 41 of the latch 22 and freeing the latch for swinging movement as the bolt 51 moves inwardly, the latch being swingable from the FIG. 7 position to the FIG. 8 position as the door is moved in door opening direction. As the latch 22 swings, the flange 36 of the latch 22 engages the hook end of the latch lever 47 to move the bolt 51 inwardly (to the right in FIG. 8) compressing the spring 62. Thus movement of either handle in door opening direction when the bolt 51 is free to move inwardly causes both release of the latch 22 from the latch keeper 26 and opening of the door. However, if the latch slide 111 is in the FIG. 19 position, the upright bar portion 143 thereof prevents advance of the bolt inwardly so that the latch 22 cannot be released from the latch keeper until the lock slide 111 is moved to the FIG. 9 position. Inward movement of the inner handle 24 and the inner latch actuating slide 76 causes movement of the lock slide 111 to released position as the arms 110 and 1130f the lock slide 111 are picked up by grooves 137 and 138 of the inner latch actuating slide 76.

The compression springs mounted on the guide pins 6 82, 83, 98 and 98" urge the latch actuating slides 74 and 76 to the centered position shown in FIGS. 3 and 9. The springs which back up against the inner face plate 98 can be stronger than the springs which back up against the outer face plate 94 so that a conscious effort must be made to move either handle in outward or door closing direction after the door is closed. Such outward movement of either handle after the door is closed moves the lock slide 111 from the released position of FIG. 9 to the locked position of FIG. 19. When the lock slide is in locked position, inward movement of the inner handle 23 and of the inner latch actuating slide 76 is effective to move the lock slide 111 to released position, but ordinarily inward movement of the outer handle 23 and the outer latch actuating slide 74 is ineffective to so move the lock slide 111. However, when the cylinder lock 173 is operated to turn the bridge member 171 into transverse position connecting the latch actuating slides 74 aid 76 to move together, inward movement of the outer handle 23 is effective to move the lock slide 111 to released position.

' Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A lock structure for a door which comprises a bolt housing for mounting in the door, a latch member mounted in the bolt housing, a bolt mounted in the bolt housing for movement therealong, a latch lever pivotally mounted on the bolt, means on the latch lever engageable with the latch member to cause the latch member to move with the bolt, means urging the bolt to a latch extended position at which the latch is engageable with a latch keeper, a latch actuating slide engageable with the latch lever to swing the latch lever to a latch released position, movement of the door in door opening direction when the latch member is released causing action of-the latch member on the latch keeper to cause the latch member to swing for releasing the latch keeper, a second latch actuating slide engageable with the latch lever to swing the latch lever to latch released position, a handle attached to each latch actuating slide, the latch member, as it swings as'the door opens, driving the bolt inwardly of the bolt housing, and a lock slide engageable by the latch actuating slides when the latch actuating slides are moved in door closing direction to move to a locked position, the lock slide locking the bolt against inward movement when in locked position, one of the latch actuating slides being engageable with the lock slide when moved in door opening direction to move the lock slide to a bolt released position.

""2. A lock structure as. in claim 1 wherein there is means for releasably connecting the latch actuating slides to move together, whereby movement of either latch actuating slide in door opening direction moves the lock slide to bolt released position.

3. A lock structure for, a door which comprises a bolt housing for mounting in the door, a latch member mounted in the bolt housing, a bolt mounted in the bolt housing for movement therealong, a latch holding member moveably mounted on the bolt, means on the latch holding member engageable with the latch member to cause the latch member to move with the bolt, means urging the bolt to a latch extended position at which the latch is engageable with a latch keeper, and a latch actuating slide engageable with the latch holding member to move the latch holding member to a latch released position, movement of the door in door opening direction when the latch member is released causing action of the latch member on a latch keeper to cause the latch member to swing inside the bolt housing with respect to the bolt and hous ing for releasing the latch keeper, and means on the latch member slideably engageable with means on the bolt for advancing the bolt in latch retracted direction against the bolt urging means to retract the bolt as the door opens.

4. In combination with a door, a lock structure which comprises a bolt housing mounted in the door, a latch member mounted in the bolt housing, a bolt mounted in the bolt housing for movement therealong, a latch lever pivotally mounted on the bolt, means on the latch lever engageable with the latch member to cause the latch member to move with the bolt, means urging the bolt to a latch extended position, a latch keeper, the latch member being engageable with the latch keeper when the bolt'is in latch extended position, a latch actuating slide engageable with the latch lever to swing the latch lever to a latch released position, movement of the door in door opening direction when the latch member is released causing action of the latch member on the latch keeper to cause the latch member to swing for releasing the latch keeper, a second latch actuating slide engageable with the latch lever to swing the latch lever to latch released posi- 15 tion, a handle attached to each latch actuating slide, the latch member, as it swings as the door opens, driving the bolt inwardly of the bolt housing, and a lock slide engageable by the latch actuating slides when the latch actuating slides are moved in door closing direction to move to a locked position, the lock slide locking the bolt against inward movement when in locked position, one of the latch actuating slides being engageable with the lock slide when moved in door opening direction to move the lock slide to a bolt released position.

5. A combination as in claim 4 wherein there is means for releasably connecting the latch actuating slides to move together, whereby movement of either latch actuating slide in door opening direction moves the lock slide to bolt released position.

References Cited 4 UNITED STATES. PATENTS 2,718,421 9/1955 Slopa Ct a1 292165 2,848,886 8/1958 Varrin et al. 292--192X 3,350,127 10/1967 Hekelaar 292-64X FOREIGN PATENTS 437,256 10/1935 Great Britain.

RICHARD E. MOORE, Primary Examiner US. 01. X.R. 292 192 

